Challenge list
Web SecurityLevel 2★★☆☆☆Web-13. Bypassing File Upload Checks in ImageVault
ImageVault is an image hosting service that accepts JPG, PNG, and GIF uploads. If its validation only checks the end…
Web SecurityLevel 2★★☆☆☆Web-14. Command Injection in a Network Diagnostic Tool
This app is a diagnostic tool that runs ping against a host you supply. If the host input is passed straight into a…
Web SecurityLevel 2★★☆☆☆Web-15. IDOR in the UserProfile Service
The UserProfile Service exposes an API that returns profile information for a given user ID. Check whether the service…
Web SecurityLevel 2★★☆☆☆Web-16. Weak JWT Secret in the CHIMERA Research Lab
Clues found after breaching the employee portal point to an isolated research lab system codenamed CHIMERA. It…
Web SecurityLevel 2★★☆☆☆Web-17. Path Traversal in FileShare
FileShare lets users list and download files from a shared folder. Check whether the filename parameter passed to the…
Web SecurityLevel 2★★☆☆☆Web-18. XXE Attack via a Contact Form
This contact form serializes its input as XML and sends it to the server, which parses it and echoes the result.…
Web SecurityLevel 2★★☆☆☆Web-19. CSRF Transfer in a Banking App
This banking app lets a logged-in user transfer money. Check whether CSRF protections exist by seeing if a separate…
Web SecurityLevel 2★★☆☆☆Web-20. SSRF via the URL Fetcher
This URL Fetcher service retrieves and displays the content of any URL a user provides. Check whether it can be…
General SkillsLevel 2★★☆☆☆Text Processing Master - sed & awk
/app/data.csv contains CSV data. Perform these operations: 1. Extract only rows where column 2 (price) >= 1000 2.…
Network SecurityLevel 2★★☆☆☆Network Analysis - DNS Zone Transfer Leak
An unauthenticated DNS zone transfer (AXFR) against a misconfigured authoritative server was captured. Download the…
Network SecurityLevel 2★★☆☆☆Network Analysis - ICMP Data Exfiltration
Data was exfiltrated from the internal host 10.20.0.15 to the external host 203.0.113.66 disguised as ping (ICMP echo…
Network SecurityLevel 2★★☆☆☆Network Analysis - SMB Share Enumeration Leak
An attacker enumerating SMB shares on the network was captured. Download the packet capture (traffic.pcap), follow the…
Network SecurityLevel 2★★☆☆☆Network Analysis - Telnet Credentials
A legacy server was administered over Telnet in clear text. Download the packet capture (traffic.pcap), follow the…
Network SecurityLevel 2★★☆☆☆Network Analysis - Anonymous FTP Transfer
An anonymous FTP session was captured in clear text. Download the packet capture (traffic.pcap), follow the FTP data…
Network SecurityLevel 2★★☆☆☆Network Analysis - Clear-text HTTP Credentials
Analyze traffic intercepted on public Wi-Fi where someone logged in over plain HTTP. Download the packet capture…
Network SecurityLevel 2★★☆☆☆Network Analysis - Plaintext SMTP Attachment
The internal host 10.30.0.25 sent an email to port 25 of the mail server 10.30.0.10 without encryption. Download…
CryptographyLevel 2★★☆☆☆Finding Hash Collisions
MD5 collisions are practical. Hashes with broken collision resistance must not be used for security-sensitive…
CryptographyLevel 2★★☆☆☆Hash Length Extension Attack
Simple signatures such as hash(secret || message) can be vulnerable to length extension attacks with Merkle-Damgard…
CryptographyLevel 2★★☆☆☆Padding Oracle Basics
Padding oracle attacks use error differences as a plaintext recovery signal. This introductory task decodes leaked…
General SkillsLevel 2★★☆☆☆Process Hunter - Hidden Process
A process named "secret_service" is running in the background. Find this process and get the following information: 1.…
CryptographyLevel 2★★☆☆☆Rainbow Table Attack
Unsalted fast password hashes can often be reversed with precomputed lookup databases. Reverse the given MD5 hash. MD5…
General SkillsLevel 2★★☆☆☆Log Analysis - Find the Intruder
/app/auth.log contains authentication logs. Detect suspicious activity: - Identify the IP address with 10+ failed…
CryptographyLevel 2★★☆☆☆One-Time Pad Key Reuse Attack
A one-time pad is safe only when the key is used once. Reusing the key lets known plaintext recover other plaintexts.…
CryptographyLevel 2★★☆☆☆Predictable Randomness
Pseudo-random output with a fixed seed is reproducible and must not be used for cryptographic secrets. Flag generation…